Re: [Emc-users] cnc lathe retrofit

On Monday 28 December 2020 04:21:37 andrew beck wrote: > Just another little update. > > Got the spindle running. > > Then connected the existing spindle encoder up and can't see any > counting of pulses in the 7i77 encoder raw counts. > I _think_ the 7i77 has the same encoder facilities as the

Re: [Emc-users] cnc lathe retrofit

On Mon, 28 Dec 2020 at 09:23, andrew beck wrote: > I think I got it all right. Though I had to run it through a plug and > transfer cable signals to other colors so could have made a mistake. Sounds like a job for an oscilloscope, but you should be able to see the output change with a

Re: [Emc-users] cnc lathe retrofit

Just another little update. Got the spindle running. Then connected the existing spindle encoder up and can't see any counting of pulses in the 7i77 encoder raw counts. Would love to have a List of reasons why not. Just so I can trouble shoot it. Things I know. It is a 5v differential

Re: [Emc-users] cnc lathe retrofit

Hey everyone just read all the replies. Definitely food for thought. Andy I currently do almost exactly what you do with the e stop in my mill. I'll do something similar with the enables tying in a relay to bypass them with the e stop and then letting linuxcnc know about it On Sun, Dec 27,

Re: [Emc-users] cnc lathe retrofit

On Sat, 26 Dec 2020 at 21:11, Gene Heskett wrote: > No synchros in that gearbox? I'd be getting quotes to replace it with one > that did. It was built in 1916. It's perfect as it is :-) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of

Re: [Emc-users] cnc lathe retrofit

On Saturday 26 December 2020 13:36:18 andy pugh wrote: > On Sat, 26 Dec 2020 at 16:49, Gene Heskett wrote: > > Two additional questions. That 70 ohm 300 watt braking resistor just > > walked up and rang my doorbell, so are you using one? > > I am not using one. It would be useful if I was,

Re: [Emc-users] cnc lathe retrofit

On Saturday 26 December 2020 12:27:29 Jon Elson wrote: > On 12/26/2020 10:47 AM, Gene Heskett wrote: > > Two additional questions. That 70 ohm 300 watt braking > > resistor just walked up and rang my doorbell, so are you > > using one? and if so what settings mods have you made in > > the VFD? >

Re: [Emc-users] cnc lathe retrofit

On Sat, 26 Dec 2020 at 16:49, Gene Heskett wrote: > Two additional questions. That 70 ohm 300 watt braking resistor just > walked up and rang my doorbell, so are you using one? I am not using one. It would be useful if I was, since I added on-the-fly gearshifting to the two speed box. The idea

Re: [Emc-users] cnc lathe retrofit

On 12/26/2020 10:47 AM, Gene Heskett wrote: Two additional questions. That 70 ohm 300 watt braking resistor just walked up and rang my doorbell, so are you using one? and if so what settings mods have you made in the VFD? Mine has several settings. There is a minimum frequency, below which

Re: [Emc-users] cnc lathe retrofit

On Saturday 26 December 2020 11:23:20 Gene Heskett wrote: > On Saturday 26 December 2020 10:08:47 andy pugh wrote: [...] > I think we are on about the same page, just need to find the round > tuit. Two additional questions. That 70 ohm 300 watt braking resistor just walked up and rang my

Re: [Emc-users] cnc lathe retrofit

On Saturday 26 December 2020 10:08:47 andy pugh wrote: > On Sat, 26 Dec 2020 at 10:00, andrew beck wrote: > > also what do people do for E stop circuits with analog systems? I > > have only used a step direction system before this > > On my lathe the main servo power supply comes via a

Re: [Emc-users] cnc lathe retrofit

On Sat, 26 Dec 2020 at 10:00, andrew beck wrote: > also what do people do for E stop circuits with analog systems? I have only > used a step direction system before this On my lathe the main servo power supply comes via a contactor with a 24V coil, and that coil power passes through two e-stop

Re: [Emc-users] cnc lathe retrofit

On Saturday 26 December 2020 04:57:38 andrew beck wrote: > hey everyone > > just for your interest here is a cnc lathe I am retrofitting here in > NZ > > link to video on youtube > > still got a whole lot of work and need to sort out analog servo

[Emc-users] cnc lathe retrofit

hey everyone just for your interest here is a cnc lathe I am retrofitting here in NZ link to video on youtube still got a whole lot of work and need to sort out analog servo drive stuff tomorrow but thought I would send a email anyway also what do